EP 0636711 A1 19950201 - Acidic cleaning aqueous solution for aluminum and aluminum alloy and method for cleaning the same.
Title (en)
Acidic cleaning aqueous solution for aluminum and aluminum alloy and method for cleaning the same.
Title (de)
Säure, wässrige Reinigungslösung für Aluminium und Al-Legierungen und Verfahren zum Reinigen.
Title (fr)
Solutions aqueuses acides pour le nettoyage d'aluminium et ses alliages et procédé de nettoyage.
Publication
Application
Priority
JP 19047693 A 19930730
Abstract (en)
An acidic cleaning aqueous solution for carrying out a low temperature acidic cleaning of aluminum and aluminum alloy and a cleaning method for the same free from harmful fluorine and chromium ions. The acidic cleaning aqueous solution includes oxidized metal ions as an etching promoter, an inorganic acid, a surfactant and a certain amount of polyhydric alcohols having at least two hydroxyl groups directly coupled with two adjacent carbon atoms of a principal chain within one molecule and further includes an oxidizing agent for oxidizing the oxidized metal ions reduced in the cleaning. Certain alcohols in the acidic cleaning aqueous solution can control the oxidative decomposition reaction of the surfactant to obtain a long life acidic cleaning aqueous solution.
IPC 1-7
IPC 8 full level
C09K 13/06 (2006.01); C11D 7/08 (2006.01); C11D 7/10 (2006.01); C11D 7/26 (2006.01); C23G 1/12 (2006.01)
CPC (source: EP US)
C23G 1/125 (2013.01 - EP US)
Citation (search report)
- [AD] WO 9119830 A1 19911226 - HENKEL CORP [US]
- [A] EP 0361102 A1 19900404 - NIHON PARKERIZING [JP]
- [A] EP 0196668 A1 19861008 - NIPPON PAINT CO LTD [JP] & US 4851148 A 19890725 - YAMASOE KATSUYOSHI [JP], et al
- [A] US 4032466 A 19770628 - OTRHALEK JOSEPH V, et al
- [A] EP 0180908 A1 19860514 - NIPPON PAINT CO LTD [JP] & US 4728456 A 19880301 - YAMASOE KATSUYOSHI [JP], et al
- [A] US RE27662 E 19730612
- [A] US 3767491 A 19731023 - CHOUGH E
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0636711 A1 19950201; EP 0636711 B1 19970625; DE 69403938 D1 19970731; DE 69403938 T2 19971120; JP 2947695 B2 19990913; JP H0741973 A 19950210; US 5688755 A 19971118
DOCDB simple family (application)
EP 94111785 A 19940728; DE 69403938 T 19940728; JP 19047693 A 19930730; US 66114396 A 19960610